Phong Tai Nguyen - Moi Truong Huyen Trang Dinh Address: Khu I, That Khe Town, Trang Dinh District, Lang Son Province Enterprise code: 4900265207 Phone: 0205883002 That Khe Town, Trang Dinh District, Lang Son ProvinceFounding date: 28 - 12 - 2007